This rule forms stable domains of irregularly spaced lines pointing in the same direction, giving a wood-like texture. Along boundaries where the lines change direction, long-lived volcano-like regions of activity form, erupting along the grain in the direction closer to normal to the boundary.

Yeah, there are lots of interesting puffers and puffer interactions that emerge from that replicator interaction. Around gen 150k there is even a crawler that displaces a puffer output line sideways. Around gen 180k there is also a sort of siderake/wickstretcher. I got to about gen 230k before HashLife started getting a bit too laggy.

I only saw orthogonal ships from the replicator interaction, but from a Golly soup I also saw this 5c/79 diagonal:

There has been some discussion of the rule B2-ae3aej4ez/S03ac4aikqryz78 on the discord. Can anybody make a search script that searches through objects like these ("exploded polyominoes") and reports spaceships found?